JP2970864B2 - Material for protective clothing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for use in protective clothing for protecting workers in handling hazardous substances, and more particularly, to toxic substances such as spraying pesticides, or manufacturing or using chemicals. The present invention relates to a material to be provided to protective clothing for protecting workers in the operation of handling harmful substances which are absorbed from the skin and have an adverse effect on the human body, such as chemicals, especially organic phosphorus compounds.

[0002]

2. Description of the Related Art Various protective clothings for protecting the human body from toxic chemicals have been proposed. For example, there is a material such as a rubberized cloth made of a material through which liquid and gaseous harmful substances do not penetrate, and has excellent protection performance. However, since the weight of the fabric is heavy and the workability when wearing it is inferior and there is no air permeability at all, heat stress is added in a hot environment or under work that requires physical exercise, and it causes a serious obstacle to workers. there were.

[0003] JP-A-60-92777 or JP-A-6-92777
No. 0-96267 discloses a technique in which a porous film is formed on the front surface or the back surface of a cloth to protect a liquid chemical substance and to reduce a feeling of stuffiness. However, it cannot completely protect gaseous chemicals and has insufficient moisture permeability or air permeability, so that it is impossible to eliminate the stuffy sensation during excessive heat or excessive exercise.

Japanese Patent Application Laid-Open No. 4-255342 discloses a material comprising a liquid impermeable layer and a gas passage preventing layer. The gas passage blocking layer uses solid particles that absorb, adsorb, and detoxify harmful gases, and can protect liquid and gaseous chemical substances. However, in this configuration, since a porous membrane is used for liquid protection, moisture permeability or air permeability is insufficient as in the above-mentioned conventional example, and there is a problem in wearing feeling.

JP-A-2-190328 exemplifies a laminated fabric for a protective suit comprising an activated carbon cloth and a reinforcing fabric bonded thereto. This is intended to provide high mechanical strength with a reinforcing fabric and protection against gaseous chemicals with activated carbon cloth, but insufficient protection against liquid chemicals.

Japanese Unexamined Patent Publication (Kokai) No. 57-156036 or Japanese Utility Model Laid-Open Publication No. 61-133508 proposes a protective clothing material in which a pile having water repellency and oiliness is arranged on the surface layer and an activated carbon layer is arranged below the pile. I have. With this structure, the surface layer protects the liquid chemical substance and adsorbs the gaseous chemical substance with activated carbon. Moreover, since these materials have air permeability, heat stress is small even in a hot environment.
However, the pressurization conditions that occur when actually wearing and working as protective clothing, that is, pressurization by the human body weight when sitting or lying down, the pressure that occurs when wearing work equipment,
In addition, there is a problem that the surface pile layer is deformed by pressure or the like due to contact with an article at a work site, and a liquid chemical substance penetrates.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the penetration of liquid and gaseous toxic chemicals, especially the penetration of liquid droplets under pressure, and to provide excellent ventilation and moisture permeability, and to provide heat even when worn. It is an object of the present invention to provide a protective garment material having a low feeling and stuffiness.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have made intensive studies and arrived at the present invention. That is, the present invention provides (a) a liquid toxic chemical substance protective layer, (b)
A protective clothing material comprising a laminated structure of a gaseous toxic chemical substance adsorption layer and (c) an adsorbent protective layer, wherein the liquid toxic chemical substance protective layer is formed of a cut pile cloth, and the cut pile cloth is formed of a cut pile cloth. The constituent pile yarn is fineness: 50 ~
It is composed of a synthetic fiber filament yarn that is a monofilament of 350 denier, and has a water repellency of 80 or more and an oil repellency of:
Grade 4 or higher, apparent specific gravity: 0.10 to 0.30, the tip of the cut pile is formed into a spherical shape by hot melting, and the thickness of the cut pile fabric is 7 gf / cm ² when loaded: 3. 0m
m or less, 1 kgf / cm ² load: 0.5 mm or more.

It is recommended that the gaseous toxic chemical substance adsorbing layer (b) be made of a fibrous activated carbon cloth. Although the protective clothing material has a three-layer structure, it is particularly preferable that a pile protective layer is disposed outside the liquid toxic chemical substance protective layer (a) to form a four-layer structure.

[0010]

The liquid toxic substance protective layer of (a) is disposed on the side of the protective clothing material far from the human body, that is, on the outer side, and the liquid toxic substance adheres to this layer and occurs in a normal wearing state, ie, liquid toxic substance. The penetration can be prevented even when the substance is pressurized from above. Liquid toxic substances generally adhere to clothing materials in the form of mist or droplets. In order to prevent these liquid substances from penetrating into the material, it is essential that the liquid substances are not easily wetted. In order to prevent penetration of liquids having various properties, not only water repellency but also oiliness is required. If the water repellency is less than 80 or the oil repellency is less than grade 4, the liquid substance may easily penetrate and harm the human body. One of the effective means for obtaining both properties of water repellency of 80 or more and oil repellency of 4 or more is to cut a cut pile cloth made of synthetic fiber with a fluorine-based water repellent and oil repellent. A method of processing can be exemplified.

In order to prevent the penetration of liquid droplets under pressure, which is the object of the present invention, it is not sufficient to make the surface of the fabric water-repellent and oil-repellent. Pressure must be prevented. For this purpose, it is useful to use a thermoplastic synthetic fiber monofilament having a denier of 50 to 350 as the pile yarn. If the fineness of the pile yarn is less than 50 denier, the pile yarn falls down due to pressure, and the attached droplets penetrate into the gaps between the fibers and permeate the back surface of the fabric. On the other hand, when it exceeds 350 denier, the fabric becomes stiff, resulting in poor wearability as a material for clothes.

As still another preferable condition, it is effective to adopt a structure in which a spherical material is formed at the tip of a pile of a cut pile fabric by heat melting. If the tip of the pile yarn is heat-melted and solidified to form a sphere, the tips of the adjacent pile yarns do not sink and contact each other even if the pile yarn falls down due to pressure. Droplets can be held, and transmission to the back surface can be prevented.

[0013] The thickness of the cut pile fabric is determined by
Under no pressure (7 gf / cm ² ): 3.0 mm or less, preferably 2.0 mm or less, when pressure is applied (1 kgf / cm ² ):
It is preferably 0.5 mm or more. When no load and no pressure (7 gf / cm ² ): If it is more than 3.0 mm, the activity in the wearing state is deteriorated, and when pressure (1 kgf / cm ² ) is less than 0.5 mm, Drops easily penetrate to the back side by pressure,
When the thickness is 0.5 mm or more, the droplet is held in the liquid chemical substance protection layer, and the penetration of the droplet can be prevented.

The fibers constituting the cut pile fabric include olefin synthetic fibers such as polyethylene and polypropylene, polyamide fibers such as nylon 6 and nylon 66, polyester fibers such as polyethylene terephthalate and polybutylene terephthalate, vinyl chloride fibers, and the like. There is no particular limitation as long as it is a thermoplastic synthetic fiber such as vinylon fiber.

The apparent specific gravity of the cut pile fabric is 0.10
It is preferably about 0.30. Below this range,
Unable to protect the penetration and permeation of liquid chemicals,
On the other hand, if it exceeds 0.30, the fabric becomes stiff, and becomes unsuitable as a material for clothes.

The gaseous toxic chemical substance adsorbing layer (b) is formed by thermally fixing granular or powdered activated carbon together with a thermosetting or hot melt type adhesive on the adsorbent protective layer (c). Or a specific surface area of 600 to 250
A cloth made of 0 m ² / g of fibrous activated carbon is exemplified. In any case, the thickness of the gaseous toxic chemical substance adsorption layer (b) is preferably 3 mm or less in consideration of wearability, and even such a thin layer completely absorbs and removes the gaseous toxic chemical substance. There is a need. From such a viewpoint, the fibrous activated carbon cloth is most practical because it has not only the flexibility and the air permeability but also the extremely high adsorption rate to the volatile gas. Furthermore, even if a liquid toxic chemical substance slightly permeates through the cut pile cloth laminated on the outer surface of the fibrous activated carbon cloth, the fibrous activated carbon cloth exerts a fast adsorption rate, so the permeated liquid Since the chemical substance is easily gasified and the volatile gasified substance is quickly adsorbed, it has an extremely excellent protective effect in suppressing the penetration of the liquid chemical substance in the thickness direction of the fibrous activated carbon fabric.

Examples of the fibrous activated carbon cloth include natural cellulose fibers such as cotton and hemp, regenerated cellulose fibers such as rayon, polynosic, and solvent spinning, polyvinyl alcohol fibers, acrylic fibers, aromatic polyamide fibers, and crosslinked fibers. It can be manufactured using synthetic fibers such as formaldehyde fiber, lignin fiber, phenolic fiber, and petroleum pitch fiber as raw materials. In particular,
Weaving using short fibers or long fibers of these raw fibers,
Knitting, a known nonwoven fabric containing a suitable flameproofing agent, if necessary, is subjected to a flameproofing treatment at a temperature of 450 ° C or less, and then activated by carbonization at a temperature of 500 ° C or more and 1000 ° C or less. A fibrous activated carbon fabric can be produced by the method.

The raw fiber used in this case is preferably a regenerated cellulose fiber, a phenolic fiber, or an acrylic fiber because the fibrous activated carbon obtained has high physical properties (strength, etc.) and excellent adsorption performance. In addition, as the activation treatment, an activation gas such as water vapor or carbon dioxide is used for 10 to 7 times.
It is preferable to carry out the heating by heating to 700 ° C. or more in a state containing 0% by volume. By selecting conditions such as activation temperature, time, activation gas concentration, etc., the specific surface area becomes 60%.
A fibrous activated carbon fabric having an arbitrary activity of 0 to 2500 m ² / g is obtained.

Examples of the form of the fibrous activated carbon cloth include a woven form, a knitted form, a nonwoven fabric form, a felt form, a paper form and the like, which are taken into consideration in terms of air permeability, ease of lamination, thinness, flexibility and the like. Preferably, the shape is a woven or knitted shape. In the carbonization activation step, the raw material fibers can be carbonized and then formed into a fabric, but from the viewpoint of handling, it is preferable to perform a carbonization activation treatment after fabric formation.

As the adsorbent protective layer (c), a thin or coarsely woven or knitted woven fabric or knitted fabric made of hydrophobic fibers is used, and a tricot knitted fabric is preferable from the viewpoint of flexibility. The purpose of the present adsorbent protective layer is to be a base cloth for adhering the powdery or granular activated carbon forming the gaseous toxic chemical substance adsorbing layer of (b), and to supplement the mechanical strength of the fibrous activated carbon cloth. It is in. In addition, there is also an effect of suppressing the sweating of the wearer of the protective clothing from being remarkable, and preventing the sweat from wetting the adsorbing layer and lowering the adsorption performance for toxic chemical substances.

In order to easily allow the vapor of sweat to pass outside the protective clothing material, it is desirable to use a hydrophobic fiber cloth as the adsorbent protective layer (c). When composed of hydrophilic fibers, the adsorbent protective layer itself absorbs and absorbs sweat, effectively transferring heat and moisture in the clothes to the outside to release heat and moisture.
The function of releasing moisture is impaired, which is not preferable. The hydrophobic fiber referred to here is a fiber having a moisture content of 3% or less at 20 ° C. and 65% RH, and examples thereof include synthetic fibers such as polyethylene, polypropylene, and polyester.

As described above, the adsorbent protective layer (c) is desirably a thin, coarse-density woven or knitted fabric, and the ratio of the bulk density of the adsorbent layer to the adsorbent protective layer is 1: 1 to 2 as described above. Preferably, there is. That is, when the density of the adsorbent protective layer is smaller than the density of the adsorbent, sweat vapor is likely to come into contact with the adsorbent layer, and the adsorption performance is reduced. On the other hand, when it is larger than twice, it is difficult to transfer the sweat vapor to the outside, and the wearability is deteriorated.

(A) a protective layer of a liquid toxic chemical substance, (b)
The gaseous toxic chemical substance adsorption layer and the adsorbent protection layer (c) need to be a laminated body in which each layer is in close contact with each other in order to easily transfer heat and moisture when worn. . Laminating means include lamination by applying an adhesive, powder,
Adhesion with a granular or non-woven hot melt adhesive, or lamination by quilting, and a combination thereof are included.

As means (b) for laminating thinly without impairing the adsorption performance of the gaseous toxic chemical substance adsorbing layer, bonding with a non-woven hot melt adhesive is preferred. As the non-woven hot melt adhesive, there are various types such as polyester type, polyamide type and vinyl acetate type.
If the temperature is preferably 120 ° C. or less, the bulk density of the liquid toxic chemical substance protective layer does not significantly increase during thermal bonding.

The pile protective layer optionally provided in the present invention is a thin woven fabric, knitted fabric or non-woven fabric, preferably a woven fabric, knitted fabric or non-woven fabric which has been subjected to water repellency and oil-repellent finishing. is there. The purpose of the present pile protective layer is to suppress the adhesion of soil, mud, dust and the like to the pile, or to prevent the pile from falling off due to catching, friction and the like during work and damage due to wear. There is also an effect that the scattered droplets or large droplets directly contact the protective material and interfere with the penetration of the droplets. Further, an outer layer cloth, a reinforcing cloth, or the like may be disposed as necessary. FIG. 3 is a schematic view showing a configuration example of the present invention, in which a pile protection layer is provided as an outermost layer. The apparent specific gravity of the pile protection layer is preferably 0.80 or less.
If it exceeds 0.80, the air permeability of the fabric will be low, making it unsuitable as a material for clothes.

[0026]

EXAMPLES The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. The evaluation method described in the examples is based on the method described below. The conditions and results of the examples and comparative examples are summarized in Table 1 at the end of this section.

Adsorption performance: JIS-
It was measured by the method described in K-1474. Pressurized liquid permeation resistance: A filter paper is placed on a glass plate, and the laminated material of the present invention is further placed on the filter paper so that the pile surface thereof faces upward, and a liquid chemical substance (a red dye is dissolved therein) is placed thereon. 3 μl of tetrachloroethane) was added dropwise. Then, a weight having a bottom area of 6 cm ² is placed thereon with a predetermined load (0.2 to 2.0 kgf).
/ Cm ² ), and the permeation of the liquid was determined by coloring the filter paper after 1 hour. Water repellency: According to JIS-L-1092 5.2 spray test. Oiliness: According to AATCC Test Method 118. Bending flexibility: According to JIS-L-1096 6.22.2 B method (slide method). Breathability: According to JIS-L-1018 6.34. Apparent specific gravity: According to JIS-L-1018 6.9.1.

Example 1 Nylon filament yarn (70d, 24 filaments) was supplied as ground yarn and nylon filament (220d, monofilament) was supplied as pile yarn using a 22 gauge 6-reed double Russell machine. After knitting the warp knitted fabric with the yarn arrangement, scouring was performed by a standard method. After that, it is dyed with an acid dye, then dried in a pad with a solution of a fluorine-based water-repellent / wax oil processing agent (Asahigard AG710 manufactured by Asahi Glass Co., Ltd.), cured at 160 ° C, and adhered to a resin solid content of 2.0 wt%. Was. Then, after knitting the knitted fabric to make a cut pile,
The tip of the pile was melted by heat to form a sphere. The knitted fabric thus obtained has a thickness of 1.88 m under no pressure (7 gf / cm ² ).
m, pressurized (1 kgf / cm ² ) thickness 0.92 mm, basis weight 310 g / m ² ,
It has an apparent specific gravity of 0.16 and a softness of 1.95 gf · cm. The air permeability is 1.
At a pressure difference of 27 cm, 8100 cc / cm ² / min, water repellency was 100, and oil repellency was class 6.

On the other hand, a spun yarn of a novolak phenol resin fiber having a denier of 2.0 denier and 20 s was 85 g / g.
m ² plain fabric in an inert atmosphere of 410 ° C. for 30 minutes, then heated to 870 ° C. for 20 minutes in an inert atmosphere to promote carbonization, and then in an atmosphere containing 12% by volume of water vapor. At 870 ° C. for 2 hours. The obtained woven fibrous activated carbon has a basis weight of 50 g / m ² , a specific surface area of 1400 m ² / g, a thickness of 0.40 mm, and an air permeability of 28.
000 cc / cm ² / min.

On the other hand, a polyester filament thread (75 denier, 36 filaments) was fully set on the front reed and a polyester filament (20 denier, monofilament) was fully set on the back reed by a 28 gauge two reed tricot machine. -2 / 1-0, back 1
After knitting the warp-knitted fabric with a structure of -0 / 2-3, the knitted fabric was scoured by a standard method and further dyed with a disperse dye. The knitted fabric thus obtained has a thickness of 0.28 mm, a basis weight of 60 g / m ² , and a permeability of 40000 cc /
cm ² / min.

Using the fibrous activated carbon fabric as an intermediate layer, a polyester nonwoven thermoplastic adhesive material having a basis weight of 20 g / m ² (Kureha) The film was laminated by a heating roller using Dynasty ES-20 ( trade name, manufactured by Tech Co., Ltd., melting point: 115 ° C.). The composite material thus obtained had a thickness of 2.3 mm, a basis weight of 480 g / m ² and an air permeability of 71.
It was 00 cc / cm ² / min, and had sufficient air permeability, strength, and flexibility as a protective material. The saturated adsorption amount of carbon tetrachloride was 45 g / m ² , and had sufficient gas adsorption performance as a protective material.

On the other hand, the effect of suppressing the liquid penetration of the protective material was examined. After attaching 3 μl microdroplet (tetrachloroethane) to the pile layer of the protective material, weight was placed from above to evaluate the permeability. As a result, the protective material showed a good liquid permeation suppression effect, Even under a pressure of ² cm, the droplets do not penetrate to the back surface and volatilize while being held in the base fabric pile layer, and slightly ooze into the activated carbon fabric layer even under a pressure of ² kgf / cm ² It was found that there was no penetration in the liquid state.

Example 2 A polyester filament yarn (50d, 24 filaments) was used as ground yarn and a nylon filament (1 filament) was used as pile yarn using a 22-gauge 6-reed double Russell machine.
60d, monofilament), and the warp knitted fabric was knitted according to the structure and yarn arrangement shown in FIG. After the pile tip of the knitted fabric was hot-melted to form a spherical product, a fluorine-based water-repellent / oil-waxing agent treatment was performed to adhere 2.0% by weight of resin solids. The knitted fabric thus obtained has a thickness of 1.30 m when no pressure is applied (7 gf / cm ² ).
m, pressurized (1 kgf / cm ² ) thickness 0.73 mm, basis weight 166 g / m ² , apparent specific gravity 0.13, rigidity 0.82
gf · cm, air permeability is 24000 cc / cm ² / min at a pressure difference of 1.27 cm, and water repellency is 100.
The oiliness was 5th grade. On the other hand, single yarn 2.0 denier 2
A plain woven fabric having a basis weight of 170 g / m ^{2 and} a spun yarn of novolak-based phenol resin fiber of 0 s was subjected to the same carbonization activation as in Example 1 to obtain a basis weight of 96 g / m ² and a specific surface area of 1400 m.
² / g, no pressure (7 gf / cm ² ), thickness 0.40 m
m, a pressurized (1 kgf / cm ² ) thickness 0.73 mm, and a woven fibrous activated carbon cloth having an air permeability of 9500 cc / cm ² / min were obtained.

Using the fibrous activated carbon fabric as an intermediate layer, the cut pile knitted fabric and the tricot knitted fabric described in Example 1 were laminated by the method described in Example 1. The composite material thus obtained had a thickness of 1.8 mm, a basis weight of 360 g / m ² and an air permeability of 8000 cc / cm ² / min, and had sufficient air permeability, strength, and flexibility as a protective material. JIS K 1474 of the protective material
The saturated adsorption amount of carbon tetrachloride was 80 g / m ^{2 based on} , and it had sufficient gas adsorption performance as a protective material. On the other hand, as a result of examining the liquid penetration resistance of the protective material under pressurized conditions,
A slight bleeding of the liquid was observed under the pressurized condition of 1.5 kgf / cm ² , but there was no problem under the pressurized condition of 1.0 kgf / cm ² or less.

Example 3 Polyester filament yarn (50d, 24 filaments) as ground yarn by a 22 gauge 6-sheet reed double Russell machine
And nylon filament (160
d, monofilament) were supplied, and a warp knitted fabric was knitted with the structure and yarn arrangement shown in FIG. The knitted fabric was cut in half to obtain a cut pile. After hot-melting the pile tip of the knitted fabric to form a sphere, it is treated with a fluorine-based water-repellent and oil-based finishing agent,
2.0% by weight of resin solids were deposited. The knitted fabric obtained in this manner has a thickness of 1.03 mm under no pressure (7 gf / cm ² ), a thickness of 0.64 mm under pressure (1 kgf / cm ² ), a basis weight of 126 g / m ² , and an apparent specific gravity.
The hardness was 0.12, the softness was 0.74 gf · cm, the air permeability was 23500 cc / cm ² / min with a pressure difference of 1.27 cm, the water repellency was 100, and the oil repellency was grade 4. The knitted fabric, the same fibrous activated carbon fabric as used in Example 1, and the reinforcing tricot knitted fabric were laminated with the same adhesive as used in Example 1. The composite material thus obtained was 1.6 mm thick and 280 g in weight.
/ m ² , air permeability 17 000 cc / cm ² / min, and had good wearability as a protective material. On the other hand, the gas adsorption performance of the composite material was the same as in Example 1 and was good.

On the other hand, a plain woven fabric using 40 s of cotton yarn was subjected to a fluorine-based water repellent / oiling treatment and adhered to a resin solid content of 3.0% by weight. The obtained woven fabric had a thickness of 0.22 mm, a basis weight of 120 g / m ² , a stiffness of 0.56 gf · cm, and a gas permeability of 3500 cc / cm at a pressure difference of 1.27 cm with a water level gauge.
² / min, water repellency was 100, oil repellency was 5th grade.

The protective material was superimposed on the woven fabric as a pile protective layer, and as a result of examining the liquid permeation resistance under a pressurized condition, the liquid oozed slightly under a pressurized condition of 1.5 kgf / cm ^2. However, there was no problem under a pressurized condition of 1.0 kgf / cm ² or less.

COMPARATIVE EXAMPLE 1 Polyester filament yarn (50d, 24 filaments) was used as ground yarn by a 22-gauge 6-reed double Russell machine.
And nylon filament (160
d, monofilament) were supplied, and a warp knitted fabric was knitted with the structure and yarn arrangement shown in FIG. The knitted fabric was cut in half to form a cut pile, and then treated with a fluorine-based water-repellent / oil-waxing oil processing agent to adhere 2.0% by weight of resin solids. The knitted fabric thus obtained has a thickness of 1.40 mm without pressure (7 gf / cm ² ),
Pressurized (1 kgf / cm ² ) 0.70 mm thick, 125 g / m ² basis weight, 0.089 apparent specific gravity, 0.75 gf · cm softness, and air permeability 1.27
The pressure difference was 21700 cc / cm ² / min, the water repellency was 100, and the oil repellency was grade 4. The knitted fabric, the same fibrous activated carbon cloth used in Example 1, and a tricot knitted fabric for reinforcement were
Lamination was performed using the same adhesive as used in Example 1. The composite material thus obtained had a thickness of 1.8 mm, a basis weight of 280 g / m ² and an air permeability of 16,500 cc / cm ² / min, and had good wearability as a protective material. On the other hand, the gas adsorption performance of the composite material was as good as the result of Example 1, but the liquid permeation resistance under the pressurized condition was poor, and the back surface was easily formed under the pressurized condition of 0.2 kgf / cm ^2. Until the droplets penetrated, it was not practical.

Comparative Example 2 Nylon filament yarn (70 denier, 17 filaments) was applied to the front reed by a 28 gauge two reed tricot machine.
The back reed is fully set with nylon filaments (20 denier, monofilament), and the warp knitted fabric is knitted with the structure of the front 1-2 / 1-0 and the back 1-0 / 2-3, in the MD direction. Then, a loop pile was developed to form a French pile, and then treated with a fluorine-based water-repellent / oil-oil-treating agent to adhere to a resin solid content of 2.0%.
The knitted fabric thus obtained is free of pressure (7 gf / cm ² )
1.18mm thick, 0.26mm thick (1kgf / cm ² ) when pressurized, weight 14
5g / m ² , apparent specific gravity 0.12, bristles are 0.65gfcm, air permeability is 15000cc / cm ² / min with a pressure difference of 1.27cm water level, water repellency is 100, oil repellency is It was 7th grade. The knitted fabric and Example 2
The same fibrous activated carbon fabric as that used in Example 2 and a tricot knitted fabric for reinforcement were laminated with the same adhesive as used in Example 2. The thus obtained composite material had a thickness of 1.7 mm, a basis weight of 350 g / m ² , and an air permeability of 6600 cc / cm ² / min. The gas adsorption performance of the composite material was as good as the result of Example 2, but the liquid permeation resistance under the pressurized condition was poor, and even under the pressurized condition of 0.2 kgf / cm ² , it easily reached the back surface. Droplets have penetrated.

Comparative Example 3 The cut pile knitted fabric used in Example 2 was prepared in the same manner as in Example 2 except that water repellency and oiling were not performed. This cut pile knitted fabric has a thickness of 1.30 mm, a basis weight of 162 g / m ² , an apparent specific gravity of 0.13, a stiffness of 0.82 gfcm, and a permeability of 24000 cc / cm ² / mi
n, water repellency 50, oil repellency 2nd grade.

The cut pile knitted fabric, the fibrous activated carbon woven fabric used in Example 2, and the tricot knitted fabric used in Example 1 were subjected to the method described in Example 1 by using a nonwoven fabric adhesive.
Adhesive lamination was performed by a lamination method. The obtained laminated cloth is
The thickness was 1.8 mm, the basis weight was 360 g / m ² , the air permeability was 8000 cc / cm ² / min, and the material had sufficient air permeability, strength, and flexibility as a protective material. The protective material had a saturated adsorption amount of carbon tetrachloride based on JIS K 1474 of 80 g / m ² , and had sufficient gas adsorption performance as a protective material. On the other hand, as a result of examining the liquid permeation resistance of the protective material under a pressurized condition, it was found that even under a pressurized condition of 0.2 kgf / cm ² , the droplet easily penetrated to the back surface, and was not practical.

[0042]

[Table 1]

[0043]

Industrial Applicability According to the present invention, protective clothing material is excellent in protection against toxic chemicals, especially in preventing permeation and penetration of liquid chemicals under pressure, and with little decrease in wearability such as heat and stuffiness when worn. Can be provided.

[Brief description of the drawings]

FIG. 1 is a structural diagram of a pile cloth of Example 1 and Example 2.

FIG. 2 is a structural diagram of a pile cloth of Comparative Example 1.

FIG. 3 is a schematic sectional view of a protective clothing material according to the present invention.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroo Fukui 2-1-1 Katata, Otsu-shi, Shiga Toyo Spinning Co., Ltd. (72) Inventor Shozo Ota 2-1-1 Katata, Otsu-shi, Shiga (72) Inventor Shoichi Kawai 2-2-2 Dojimahama, Kita-ku, Osaka-Toyobo Co., Ltd. Headquarters (58) Field surveyed (Int. Cl. ⁶ , DB name) A62B 17 / 00 A62D 5/00

Claims (3)

(57) [Claims] 1. A protective clothing material comprising a laminated structure of a liquid toxic chemical substance protective layer, a gaseous toxic chemical substance adsorption layer, and an adsorbent protective layer, wherein the liquid toxic chemical substance protective layer is made of cut pile cloth. In addition, the pile yarn constituting the cut pile fabric has a fineness:
It is composed of 50 to 350 denier monofilament synthetic fiber filament yarn, and has a water repellency: 80 or more, oil repellency: 4 or more, apparent specific gravity: 0.10 to 0.30, and The tip forms a spherical material by heat melting, and the thickness of the cut pile fabric is 7 gf / cm ² when loaded:
3.0 mm or less, when 1 kgf / cm ^{2 is} loaded: 0.5 mm or more. 2. The protective clothing material according to claim 1, wherein the gaseous toxic chemical substance-adsorbing layer is composed of a fibrous activated carbon cloth. 3. The protective clothing material according to claim 1, wherein a pile protection layer is disposed outside the liquid toxic chemical substance protection layer.